Birth Control??

There's a possibility that I might end up having sex with my SO at some point in the near future, just because we've gotten pretty close a few times. Thought it'd be a good idea to figure out about birth control first. Different methods? Where to get them? What do you use? Can I get anything without parents? I'm only 16, so what to do? Ugh, sex ed classes have proven to be useless in this department.